If you really want help with this problem, put together a small test suite that gives some inputs and some sample outputs (that you tabulate by hand) and wait for someone to produce a MATLAB function to do what you want.
This is an interesting problem. Acting as an administrator, I cleaned it up and added some tests.
Find the sum of all the numbers of the input vector
Remove the vowels
Project Euler: Problem 10, Sum of Primes
Back to basics 17 - white space
Length of the hypotenuse
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